diff --git a/scripts/abi_check.py b/scripts/abi_check.py
index 98d8be4..14250d2 100755
--- a/scripts/abi_check.py
+++ b/scripts/abi_check.py
@@ -1,18 +1,19 @@
 #!/usr/bin/env python3
-#
-# This file is part of Mbed TLS (https://tls.mbed.org)
-#
-# Copyright (c) 2018, Arm Limited, All Rights Reserved
-#
-# Purpose
-#
-# This script is a small wrapper around the abi-compliance-checker and
-# abi-dumper tools, applying them to compare the ABI and API of the library
-# files from two different Git revisions within an Mbed TLS repository.
-# The results of the comparison are formatted as HTML and stored at
-# a configurable location. Returns 0 on success, 1 on ABI/API non-compliance,
-# and 2 if there is an error while running the script.
-# Note: must be run from Mbed TLS root.
+"""
+This file is part of Mbed TLS (https://tls.mbed.org)
+
+Copyright (c) 2018, Arm Limited, All Rights Reserved
+
+Purpose
+
+This script is a small wrapper around the abi-compliance-checker and
+abi-dumper tools, applying them to compare the ABI and API of the library
+files from two different Git revisions within an Mbed TLS repository.
+The results of the comparison are formatted as HTML and stored at
+a configurable location. Returns 0 on success, 1 on ABI/API non-compliance,
+and 2 if there is an error while running the script.
+Note: requires Python 3, must be run from Mbed TLS root.
+"""
 
 import os
 import sys
@@ -205,8 +206,8 @@
                 " The results of the comparison are formatted as HTML and"
                 " stored at a configurable location. Returns 0 on success, "
                 "1 on ABI/API non-compliance, and 2 if there is an error "
-                "while running the script. # Note: must be run from "
-                "Mbed TLS root."
+                "while running the script. Note: requires Python 3, "
+                "must be run from Mbed TLS root."
             )
         )
         parser.add_argument(